| Family | Pteridophyllaceae |
| Scientific name | Pteridophyllum racemosum Siebold & Zuccarini |
| Synonyms | none |
| Common name | (Japanese common name) osa-ba-gusa [reed like leaved weed] |
| (English common name) none | |
| Distribution | (Japan) Honshu (north of Central region) |
| (Other nations) none | |
| Chromosomal number | n=9, 2n=18 |
| Description | Scapes 15-25cm. Leaves 10-20cm length, 2-3cm width. Flowers white 4 petals each ca. 5mm, flowering in May to June. Perennial plants. |
| Reference | Pteridophyllum racemosum Siebold & Zucc. |
| Note | Endemic to Japan. |
| May 2007 at my home |
April 2006 at my home |